Radio receiving apparatus



Sept. 22, 1931. A. F. VAN DYCK 1,824,517

RADIO RECEIVING APPARATUS Filed Nov. 7, 1925 INVENTOR ARTHUR F. VAN DYCK AT ORNEY if apparatus, translating Patented Sept. 22, 1931 UNITED TATES PATENT OFFICE Ammm r. VAN mum, on YoNxERs, new YORK, ASSIGNOR To RADIO CORPORATION OF AMERICA, A CORPORATION OF DELAWARE RADIO nncmvmo ArrAnA'rus Application filed November My invention relates to radio receiving apparatus of the vacuum tube typeand particularly to supplementary current supplies therefore.

An object of my invention is to provide a multi-circuit connector means in combination with a portable radio apparatus and a plurality of alternative current sources.

Another object of my invention is to proa vijde a connector system adapted to connect,

alternatively, portable sources of current, or

non-portable sources of current, to aportable radio apparatus. I

Another object of my invention is to provide a multiple-circuit connector device having a prong member and plurality of socket members adapted to complete the circuits of a vacuum tube radio apparatus.

Another object of my invention is to pro- A vide a connection system having a portable member and a stationary member respective 1y connected to portable and non-portable current sources and an interchangeable member connected to a portable radio apparatus.

It has been found possible to design radio receiving devices, preferably of the superheterodyne type, which will function with a small loop antenna and which are sufiiciently compact, so thatthe circuits, receiving device, and current supply sources may e mounted within a cabinet of such size and weight as to be conveniently portable. A typical apparatus of this kind embodies therein the super-hetero- 5 dyne circuits, and triode vacuum tubes in such type and number as to be conveniently energized by the provided 1 volt A batteries, a C battery and four 22 volt B batteries. The requirement of ortability, however, re-

s. stricts both the num er and size of the batteries incorporated in the apparatus and, therefore frequent renewal of the batteries becomes necessary when the apparatus is in regular use.

Since a portable set is frequently used for substantial periods of time in a fixed location, it has been found desirable to provide additional, alternative current sources for connection with the apparatus when it is in .3 use in such a fixed location, for the purpose of 7, 1925. Serial No. 67,475.

avoiding the drain upon the small sized batteries which are desirable in the portable case. This connection between the receiving circuits and the portable current sources or between the circuits and the non-portable sources must be one which is conveniently and easily made, otherwise the user will not take the trouble to change to the non-portable batteries when the set is returned from transportation to the stand. Also the connection means must be such that the user will not be able to connect the circuits wrongly, to the injury of the vacuum tubes.

This may be conveniently done by the apparatus of my invention which provides in the portable radio apparatus a set of small portable batteries connected to a socket connector means and cooperating plug member which in turn is connected to the radio receiving circuits. These members are conveniently contained within the portable case. A second socket member is provided, attached to the non-portable current sources, adapted to enter the portable case through an opening in the bottom thereof and to receive the 7r prongs of the second connector member. By this means, convenient interchange between the two sets of current sources is provided and correctness of connection insured.

Other objects and structural details of my 30 invention will be apparent from the following descriptionwhen read in connection with the accompanying drawings, wherein:

- Fig. 1 is a perspective view in rear elevation of the apparatus of my invention and,

Fig. 2 is a sectional view of the connector members of my invention.

In Fig. 1 a portable cabinet 1 contains the circuits, triodes and apparatus of a radio receiving system as disclosed by my copending application Serial No. 57,339, filed September 19, 1925. A stand cabinet 2 is provided containing the supplementary sources of current as shown by my copending application, Serial No. 67,474, filed November 7, 1925. In Fig. 1 the A batteries 3 and a C battery are positioned upon the left hand side of the rear of the cabinet 1 and the B? batteries 4 are positioned upon the right. Connections from these various batteries are brought to sequence.

a socket connection plate in a predetermined Acable 6 contains the circuit wires to the radio c1rcu1ts whlch are connected to a pronged connecting member 7 in asimilar sequence. -Another socket connector member 8 is provld-ed and mounted upon the top of the stand cabinet 2. Connections are made .from the socketsin the member 8 to the current sources contained in the cabinet 2'according to the previously mentioned disclosure These connections are made in similar sequence to the connections to the socket plate 5. i

This construction is better shown in sectional detail in Fig. 2 which shows the connection; member 8' having an auxiliary'plate 9 and prongs 11 which are connected to the .wires 12inaking up the-cable 6. 7 Fig. Q-further shows the socket'pl'ate 8 and a sub-plate 1 in which are contained metal socket members '15 connected to wires 16 which lead to the current sources disclosed in the previously mentioned application.

the operation of my device the radio apvpa-ratus may bebrought to a portable condi- V apparatus returned to a settled place it may be positioned upon the stand cabinet 2. v

This operation inserts the socket connector plate 8 through an opening in the bottom of the. cabinet 1 asshown. The prong connector plate; 7 may then be removed. from the socket connector member 5 and inserted within the socket plate 8 whereupon the batteries 3 and 4 are disconnected from service and current f sources shownin the'previously mentioned disclosure are connected. The apparatus then functions as a non-portable receiver.

The operation of inserting the connector member 7 within either the socket member 5 or the socket member 8 is a very simple procedure which is made such that improper connection is not possible-and, therefore, correct polarities and potentials are applied from either setof current sources to the radio apparatus. a V VVhile I haveshown but one embodiment of my invention in the foregoing drawings and'descriptions it is capable of variousmodifications therefrom without departing from the spirit thereof, and it isdesired therefore that only such limitations shall be imposed thereon ascare' required by the prior-art or indicated by the appendedclaims.

r I claim as'niy invention:'

lQIncombination, a portable cabinet includinga radio apparatus, connectormeans comprising a'sing le'cable connectedat one end to the various circuitsof said apparatus,

a single plug member connected to the other end of said cable, a pair of socket members adapted to receive said plug member, independent current sources, either of said sources being adapted to energizeall the circuits of the portable apparatus, connections between said socket members and sources of current, one of said sourcesof current being smaller than the other and mounted within said portable cabinet, a non-portable cabinet, said other current source being disposed withinsaid'non-portable cabinet, and means forjfacilitating selectiveconnection of said plug member with the socket member connected to the larger current source when said portablecabinet is'positioned against said non-portable cabinet.

2. In apparatus of the character described, a portable cabinet housing radio apparatus and a relatively small source of electrical energy adapted to energize all the cir-- cuits of the apparatus, a relatively nonportable cabinet housing a relatively large 'i source of electrical energy adapted. to enertus, connector means in the portable cabinet comprising a cable having at one end a connector, member" and connected at its other end to theradio apparatus in the portable 9 gize all the circuits ofxthe portable'apparacabinet at points where current is to be suppliedthereto, a socket member attached to said portable cabinet, for the reception of said connector member, connections from said, socket member tothe smaller source of electrical energy, a second socket member fixed to the non-portable cabinet for the alternate reception of said connector and conn-ections from said second socket member to said larger source of electrical energy Wltllin the non-portable cabinet and means providing an aperture in the portable cabinet for receiving the second socket when the portable cabinet is positioned onthe nonportable cabinet. 1

V 3. In combination, a relatively non-portable cabinetcontaining relatively large nonportable sources of current fora radio re ceiver,asocket member protruding from the top of said cabinet and connections from the current sources to the socket; and a portable cabinet containing radio receiving apparatus and relatively small portable current sources and having an opening in its base for a ARTHUR F. VAN DYCK. 

